Dear All,
I have recently been trying out typed/racket with an eye toward using it in
my regular programming. I've hit a snag, and hopefully it's a newbie
mistake that you folks can set right.
I'd like to write a function that consumes an s-expression and produces a
struct -- something similar to building a tree struct out of a tree sexp.
In the past, I've always used match for this kind of sexp manipulation.
However, if I have a match clause within a function like this:
(: my-func (Sexp -> mystruct))
(define (my-func s)
(match s
[(list args ...) (make-mystruct (map my-func args))]))
the type of args is (Listof Any), not (Listof Sexp), and thus my-func
cannot be applied to it.
But if I have a clause like this:
[(list a) (make-mystruct (my-func a))]
the type of a is Sexp.
Am I misusing the Sexp type somehow?
Thanks for your time,
- Tim
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